.b-wrapper {
    position: absolute;
    left: 0;
    top: 0;
    right: 0;
    bottom: 0;
    overflow: visible;
    /* background: #fff; */
}

.b-pullup-wrapper {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 60px;
    line-height: 60px;
}

.b-pulldown-wrapper {
    position: absolute;
    width: 100%;
    top: 0;
    left: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: all;
    pointer-events: none;
}

.b-pulldown-wrapper .after-trigger {
    margin-top: 10px
}
.b-scroll-content{
    min-height: 100%;
    position: relative;
    padding-bottom: 32px;
    box-sizing: border-box;
}
.b-scroll-bottom{
    position: absolute;
    bottom: 0;
    width: 100%;
    height: 32px;
    line-height: 32px;
    text-align: center;
    color: #bfbfbf;
}